CATALOGUE. 221 flowers in a dense head on a peduncle much longer than the leaves; calyx flattened, "2-cleft, 2-keeled; fruit corky and not readily separating into the 2 nutlets."—New Mexico, Loew. Veebena hastata, L.—Utah. Veebena beacteosa, Michaux.—Utah. Veebena Aubletia, L.—Arizona; New Mexico, at Santa F6 (12); also in Rocky Canon, Arizona. LABIATE. By Peof. T. C. Poetee. Mentha vieidis, Linn.—Camp Bowie, Arizona, at 5,300 feet elevation, August, 1874, Rothrock (491). Introduced! Mentha Canadensis, Linn.—Utah, 1871,1872, Watson's Report; Zuni, N. Mex, at 6,500 feet elevation, July, 1874, Rothrock (168); Sanoita Valley, Arizona, at 4,350 feet elevation, September, 1874, Rothrock (687).— Var. GLABEATA, Bcuth., Upper Arkansas, Colorado, 1873, Wolf (778). Lycopus sinuatus. Ell.—Utah, 1871, 1872, Watson's Report. An imperfect specimen of a Lycopus, collected in San Luis Valley, Colorado, September, 1873, by Professor Wolf (782), appears to be L. lucidus, Turcz., var. Americanus, Gray (Proc. Am. Acad. 8, p. 286) MONAEDELLA ODOEATISSIMA, Beuth. (Watsou, Bot. King, p. 235).— Nevada and Utah, 1871, 1872, Watson's Report. Hedeoma hyssopifolia. Gray (Proc. Am. Acad. 11, p. 96).—Nearly glabrous; stems from a perennial branching caudex, slender, scarcely a foot high; leaves crowded, nerved, the main ones linear-lanceolate, |^ to f of an inch long and a line wide, the parallel veins running toward the apex, the upper gradually reduced until shorter than the calyx, the lowest much shorter and broader, with strong and more diverging nerves beneath; whorls loosely 3- to 5-flowei-ed; calyx narrow-tubular, slightly hairy, the setaceous teeth incurved, the lower ones exceeding the upper; corolla 7 to 8 lines long and twice the length of the calyx ; upper lip 2-lobed —Mount Graham, Arizona, at 9,000 feet elevation, August, 1874, Rothrock (418); Arizona, 1873, Loew (780).—Plate XVII. Natural size. Fig. 1. Flower, enlarged 5 diameters. Fig. 2. Longitudinal section through flower, 5